Muffler with aspirating means



Aug. 24, 1965 K. TREIBER MUFFLER WITH ASPIRATING MEANS Filed Dec. 9, 1963 EXHHUST INVENTOR Jferzrzeii? L. 77*ez'ber 771. J BY 222a ATTORNEYS United States Patent 3,202,240 MUFFLER WITH ASPIRATING MEANS Kenneth L. Treiber, 402 Villamay Blvd, Alexandria, Va. Filed lDec. 9, 1963, Ser. No. 329,325 6 Claims. (Cl. 181-51) (Granted under Title 35, U.S. Code (1952), sec. 266) The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment to me of any royalty thereon.

The invention relates generally, to improvements in engine exhaust mufflers to muffle sound.

More particularly, this invention relates to a new exhaust muffler which will not only efficiently muffle sound but is of such structural arrangement as to prevent rain or snow from entering the muffler. I

In the past it has always been a problem in military field operations in rainy regions of the tropics to provide a muffler which would efiiciently muffie noises in proximity to the enemy and at the same time prevent large amounts of rain from entering the engine which Wouldnot only drown out the combustion engine but would in some cases cause the engine to explode resulting in total destruction of the engine.

Briefly, the above problem was solved by providing a new and simplified type of exhaust mufiier which would consume a minimum of space, efiiciently muflie sound and prevent a downpour'of rain from drowning out the engine. This new muffier employs a number of novel features, such as, the aspirating, effect of mixing exhaust gases with induced air in the muflier for heat transfer to cool the mufiier and at the same time to more effectively mufiie sound. 7

One embodiment of the invention, in addition to the above novel features, employs additional internalbafiles.

to more effectively mufile exhaust sound in proximity to any enemy where detection would be hazardous to military field personnel.

The main object of the invention is to provide a subs'tantially weatherproof mufller to eliminate exhaust sparks, flashes and issuing flame without substantially dampening or dissipating the exhaust gases issuing from the exhaust manifold of a combustion engine.

Another object of the invention is to provide a weatherproof muffler which is simple, compact and has an aspirating effect by inducing fresh air into the exhaust stream before leaving the muffler.

Another object of the invention is to provide a weatherproof mufiier having baflles therein.

A further object of the invention is to provide a weatherproof muffier having dampening filter material therein.

A still further object of the invention is to provide a muffler which is effective, simple and easy to manufacture.

With these and other objects in view, as will hereinafter more fully appear, and will be more particularly pointed out in the appended claims, reference is now made to the following description taken in connection with the accompanying drawings in which:

FIGURE 1 illustrates a sectional view in elevation of one exemplary embodiment of the invention;

FIGURE 2 shows a sectional view in elevation of a second embodiment of the invention; and

FIGURE 3 shows a sectional view in elevation of a third embodiment of the invention having baffles therein.

Referring now to the drawings:

FIG. 1 illustrates one exemplary embodiment of the invention made generally from plate weldments, as

shown, in which top plate 9 is welded at least fourequal spaced circumferential places 9a to upright container rim 10 having apertures 10a equally spaced about the circum- 3,2h2l40 Patented Aug. 24, 1965 ferential perimeter of member 10. Angle rim 12 is welded to member 11 providing aperture 11a between the above equal spaced circumferential weldments 9a. Bottom plate member 14 is welded to member 10 and flange member 15. Flange member 15 is secured to exhaust pipe 17 by thread and screw means 16. Exhaust gases enter from a combustion engine (not shown) by exhaust pipe 17 into chamber A, which pass through apertures 10a and 11a upward to the outside of muffier 8 causing an aspirating efiect by mixing of outside air with exhaust gases which induces air into aperture 18 and out through aperture 11a with the expelled exhaust gases. In rainy regions rain falls off of plate member 8 and flows through aperture 11a and outward through aperture 18 never entering chamber A of exhaust muffler 3.

FIG. 2 is a second embodiment of the invention of similarly fabricated component parts and shapes of desired metal by casting, forming and the like as shown. Muffler 19 is composed of top plate member 22, bottom member 24 which terminates as shown in at least four equally spaced circumferential members 24a providing apertures 245, with the internal edge of member 24 terminating in flange member 23 which is secured to exhaust pipe member by thread and screw means 29 (or other desired securing means). Outer member 23 may be integral or welded to the intermediate portion of member 24 at four (or any desired number of) points in a suitable manner to provide apertures 26, as shown. In use, exhaust gases of pipe 3% enter into chamberB of muffler 19 and pass out through aperture 24b to the atmosphere. The exhaust gases create an aspirating effect by including air through aperture 26 which intermix with exhaust gases causing a cooling and mufiiing effect around mufli'er 19 by the passage of the exhaust gases from the combustion engine. During exhaust, rain may fall on member 22 passing down through aperture 2e between members 23' and 24 to the atmosphere without coming into contact with chamber B of mufiier 19 or causing damage to the combustion engine.

In FIG. 2 members 22 and 24 are formed with a special shape of contour to impart more kinetic energy to the exhaust gases before passage to the atmosphere.

FIG. 3 is a third embodiment of the invention in which internal baffles 36 and 37, or similar filter like structure, are employed in chamber C of mufiler to increase the muflling of the sound of the exhaust from a combustion engine. Plate member 35a is secured either by peening or screw and thread means 39 to a plurality of circumferential members 38 as shown by members 21 in FIG. 2. Member 38 of FIG. 3 is integral or secured by weldment to member 5t). Concentric circumferential baflles 37 form an intermediate portion of member 5i). Likewise, concentric circumferential baiiles 36 form an intermediate portion of upper member 35a. Baflles 36 and 37 are interposed in juxtaposed relationship in chamber C, as shown, to provide a more tortuous passage for the exhaust gases to entrap the exhaust sound Waves and provide a more effective muffiing effect of the exhaust explosions in the cylinders of the attached combustion engine. Member 40 is suitably attached to member 59 providing a plurality of suitable circumferential rain and air openings or apertures 41 as shown, similar to aperture opening 26 of FIG. 2. Flange member 42 is integrally or suitably attached to member 5t as shown. Flange means 42 is attached by thread means 44 or other suitable means to exhaust pipe 45 of the combustion engine (not shown). In use, the exhaust gases pass from exhaust pipe 45 into chamber C of mufller 35 through bafiies3 and 37, apertures 33, out between the edges of members 35 and 40 to the atmosphere.

Various modification and changes may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, it is to be understood, that this is not to be limited in any manner except as set forth in the following appended claims.

I claim: V 1. In a combustion engine exhaust mufiler: a first, a second and a third plate means,

each of said plate means having an inner and an outer surface means,

each or" said first and second plate means having a peripheral edge, 7 said third plate means having a first and a second edge, e I said second plate means having a centrally apertured flange means providing an inlet means for hot exhaust fluids; first spacing means connected between the peripheral edges of said first and second plate means,

outlet means formed by said spacing means between said peripheral edges;

second spacing means connected to the'outer surface of one of said first and second plate means and coneected to said third plate means; 7 means for entraining the atmosphere into the exhaust fluid having an input means and an output means,

the input means for said means for entraining including a channel means defined by the'outer surface of saidsecond plate means and the inner surface of said third plate means above said first edge of said third plate means and including said outlet means formed by said spacing means between said peripheral edges, the output means for said means for entraining defined by the inner surface of said third plate means atsaid second edge of said third plate means and the peripheral edge of said first plate means,

a portion of said inner surface of said third plate means located in the path of the. hot exhaust fluid from said outlet means;

said means for entraining serving to lower the temperature of said hot exhaust fluids which are directed upward by said third plate means resulting in a lower temperature for said third plate means relative to said first and second plate means,

and said means for entraining serving to direct rain and snow away from said outlet means through said channel means. a 2. 'An exhaust mufiler as in claim 1 in which said first plate means includes internal baflle means and said second plate means'includes internal bafile means juxtaposed to said first baflle means to provide a tortuous path to muffle the sound waves from the exhaust.

3. An exhaust mufiler as in claim 1 in which saidapertured flange means includes thread means for intercon- V necting said mufller to the exhaust pipe of a combustion engme.

'4. An exhaust mufiler as in claim 1 wherein said first and second plate means are substantially planar in configuration.

5. An exhaust muffler as in claim 1 wherein said first and second plate means are arcuate in cross section.

6. An exhaust mufiler as in claim 1 wherein said third plate means is arcuate in cross section.

7 References Cited by the Examiner UNITED STATES PATENTS LEO SMILOW, Primary Examiner. 

1. IN A COMBINATION ENGINE EXHAUST MUFFLER; A FIRST, A SECOND AND A THIRD PLATE MEANS, EACH OF SAID PLATE MEANS HAVING AN INNER AND AN OUTER SURFACE MEANS, EACH OF SAID FIRST AND SECOND PLATE MEANS HAVING A PERIPHEAL EDGE, SAID THIRD PLATE MEANS HAVING A FIRST AND A SECOND EDGE, SAID SECOND PLATE MEANS HAVING A CENTRALLY APERTURED FLANGE MEANS PROVIDING AN INLET MEANS FOR HOT EXHAUST FLUIDS; FIRST SPACING MEANS CONNECTED BETWEEN THE PERIPHERAL EDGES OF SAID FIRST AND SECOND PLATE MEANS, OUTLET MEANS FORMED BY SAID SPACING MEANS BETWEEN SAID PERIPHERAL EDGES; SECOND SPACING MEANS CONNECTED TO THE OUTER SURFACE OF ONE OF SAID FIRST AND SECOND PLATE MEANS AND CONNECTED TO SAID THIRD PLATE MEANS; MEANS FOR ENTRAINING THE ATMOSPHERE INTO THE EXHAUST FLUID HAVING AN INPUT MEANS AND AN OUTPUT MEANS, THE INPUT MEANS FOR SAID MEANS FOR ENTRAINING INCLUDING A CHANNEL MEANS DEFINED BY THE OTHER SURFACE OF SAID SECOND PLATE MEANS AND THE INNER SURFACE OF SAID THIRD PLATE MEANS ABOVE SAID FIRST EDGE OF SAID THIRD PLATE MEANS AND INCLUDING SAID OUTLET MEANS FORMED BY SAID SPACING MEANS BETWEEN SAID PERIPHERAL EDGES, THE OUTPUT MEANS FOR SAID MEANS FOR ENTRAINING DEFINED BY THE INNER SURFACE OF SAID THIRD PLATE MEANS AT SAID SECOND EDGE OF SAID THIRD PLATE MEANS AND THE PERIPHERAL EDGE O SAID FIRST PLATE MEANS, A PORTION OF SAID INNER SURFACE OF SAID THIRD PLATE MEANS LOCATED IN THE PATH OF THE HOT EXHAUST FLUID FROM SAID OUTLET MEANS; SAID MEANS FOR ENTRAINING SERVING TO LOWER THE TEMPERATURE OF SAID HOT EXHAUST FLUIDS WHICH ARE DIRECTED UPWARD BY SAID THIRD PLATE MEANS RESULTING IN A LOWER TEMPERATURE FOR SAID THIRD PLATE MEANS RELATIVE TO SAID FIRST AND SECOND PLATE MEANS, SAID SAID MEANS FOR ENTRAINING SERVING TO DIRECT RAIN AND SNOW AWAY FROM SAID OUTLET MEANS THROUGH SAID CHANNEL MEANS. 